On January 29, 1994, the House of Blues opened on Decatur Street as the nascent chain’s second venue. It is now the oldest, and smallest, of the 13 House of Blues music clubs/restaurants nationwide. It has presented thousands of performances in its 850-capacity main room and smaller Parish room. With its top-flight production capabilities and national resources – the HOB chain is now part of the Live Nation empire – the venue has hosted scores of marquee names, including Eric Clapton, Bob Dylan, Aerosmith, Johnny Cash, Erykah Badu, B.B. King and Elton John. But local favorites are also featured. Trumpeter Kermit Ruffins and his Barbecue Swingers headline Saturday’s 20th anniversary party; blues-based guitarist Colin Lake opens the show. Admission, limited to those 18 and older, is free, but capacity is limited.

Brian Charette, Snug Harbor, 8 and 10 p.m.

New York City Hammond B3 organist and pianist Brian Charette has backed the likes of Joni Mitchell, Chaka Khan and Lou Donaldson, and released his own jazz albums as a leader. At Snug, he’ll be joined by acclaimed local drummer Johnny Vidacovich.

Woodenhead, Carrollton Station, 9 p.m.

For more nearly 40 years, the four members of Woodenhead have fused rock, classical and jazz in instrumental excursions with odd meters, complex arrangements, and improvised solos, in the spirit of the Mahavishnu Orchestra.

Bill Kirchen, Chickie Wah Wah, 9 p.m.

Bill Kirchen earned the honorific “The Titan of the Telecaster” over multiple decades as a master of the instrument, including his “Hot Rod Lincoln” years with Commander Cody. He’s gone on to back the likes of Elvis Costello and Emmylou Harris with a bone-rattling Telecaster twang that draws on surf rock and rockabilly.

Jimmy’s Music Club Appreciation Party, Jimmy’s Music Club, 8 p.m.

Jimmy Anselmo, founder of Jimmy’s Music Club, hosts a free event at the Carrollton neighborhood venue that, as of late, has called itself the Willow. Scheduled performers include The Call Girls and special guest Brad Orgeron of the Backstabbers, JD Hill & the Jammers with Paula Rangell, Chance Casteel and Big Chief Kevin Goodman of the Flaming Arrows, and comedian Johnny Rock.